diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a0..e93244a4d 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,13 +1,20 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I predict it will throw a syntaxerror because the parameter  'str' is already declare in the definition,
+//and  line 9 try to declare another variable with the same name so the error will be identifier 'str'has already been declared .
+
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+// function capitalise(str) {
+//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//   return str;
+// }
+// capitalise("ahmadhmedan");
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> As I predict it will throw a SyntaxError: Identifier 'str' has already been declared
+//because in JavaScript we can not redeclare the same variable in the same scope. 
+function capitalise(str){
+  return `${str[0].toUpperCase()}${str.slice(1)}`;
+}
+console.log(capitalise("ahmadHmedan"));
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f..ac5c2f632 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -2,19 +2,29 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-
+// my prediction it will throw a syntaxerror because the parameter decimalNumber is already declare in the definition.
+//and  line 11 try to declare another variable with the same name so the error will be identifier 'str'has already been declared .
+//
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// function convertToPercentage(decimalNumber) {
+//   const decimalNumber = 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+//   return percentage;
+// }
 
-console.log(decimalNumber);
+// console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> As I predicted, SyntaxError: Identifier 'decimalNumber' has already been declared
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cf..91ceb4891 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -3,18 +3,21 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> // It will throw a syntaxerror because in the function definition we sit the parameter name not the value
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
-// =============> write the error message here
+// =============> SyntaxError: Unexpected number
 
-// =============> explain this error message here
+// =============> As I predicted we must set the parameter name in the definition
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
-
+// =============> 
+    function square(num) {
+    return num * num;
+}
 
+console.log(square(3));
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b41..abb3a7405 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,14 +1,19 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> it will throw a syntaxerror because I can not use  nested console.log. 
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+// function multiply(a, b) {
+//   console.log(a * b);
+// }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+// console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> The result of multiplying 10 and 32 is undefined undefined because If I want to keep the value with me after the function finishes, I must use return.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiply(a, b) {
+  return(a*b);
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcf..1598b4450 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,13 +1,18 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> It will not return the value.
 
-function sum(a, b) {
-  return;
-  a + b;
-}
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> any think we do after return will not coding.
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a+b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 57d3f5dc3..025d7dfff 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -1,24 +1,39 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> first it will convert the number to string then it will slice the last character that function
+//then will print 
+//The last digit of 42 os 2
+//The last digit of 105 os 5
+//The last digit of 806 os 6
 
-const num = 103;
+// const num = 103;
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+// function getLastDigit() {
+//   return num.toString().slice(-1);
+// }
 
-console.log(`The last digit of 42 is ${getLastDigit(42)}`);
-console.log(`The last digit of 105 is ${getLastDigit(105)}`);
-console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+// console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+// console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+// console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> The last digit of 42 is 3
+//The last digit of 105 is 3
+//The last digit of 806 is 3
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> Because the function always takes the global variable witch is 103
+//the output will be the same witch 3.
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> write your new code her
+
 
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1..1c3744b27 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -15,5 +15,7 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
\ No newline at end of file
+    return (weight/(height*height)).toFixed(1);
+    
+}
+console.log(calculateBMI(70,1.73));
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad..ddcfb3ed2 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -14,3 +14,26 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+// function ConvertToUpperSnakeCase(s1)
+// {
+//  let result = "";
+//     for(let i=0;i<s1.length;i++)
+//     {
+       
+//         if(s1[i]===" ")
+//         {
+//            result+=s1[i]="_";
+//         }
+//         else
+//             result+=s1[i];
+//     }
+//         let upperSnakeCase=result.toUpperCase();
+//    return upperSnakeCase;
+// }
+// console.log(ConvertToUpperSnakeCase("Ahmad Hmedan"));
+
+function convertToUpperSnakeCase(str) {
+  return str.replaceAll(" ", "_").toUpperCase();
+}
+console.log(convertToUpperSnakeCase("Ahmad Hmedan"));
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/3-to-pounds.js b/Sprint-2/3-mandatory-implement/3-to-pounds.js
index 6265a1a70..761606f6c 100644
--- a/Sprint-2/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,12 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function toPound(penceString) {
+  const penceWithoutP = penceString.substring(0, penceString.length - 1);
+  const paddedPence = penceWithoutP.padStart(3, "0");
+  const pound = paddedPence.substring(0, paddedPence.length - 2);
+  const Pence = paddedPence.substring(paddedPence.length - 2);
+  return `£${pound}.${Pence}`;
+}
+console.log(toPound("100p"));
diff --git a/Sprint-2/4-mandatory-interpret/time-format.js b/Sprint-2/4-mandatory-interpret/time-format.js
index 7c98eb0e8..e42364b9a 100644
--- a/Sprint-2/4-mandatory-interpret/time-format.js
+++ b/Sprint-2/4-mandatory-interpret/time-format.js
@@ -3,13 +3,14 @@ function pad(num) {
 }
 
 function formatTimeDisplay(seconds) {
-  const remainingSeconds = seconds % 60;
+  const remainingSeconds =  seconds % 60;
   const totalMinutes = (seconds - remainingSeconds) / 60;
   const remainingMinutes = totalMinutes % 60;
   const totalHours = (totalMinutes - remainingMinutes) / 60;
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61));
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
@@ -17,18 +18,18 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> Three time
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> num =0
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> return value='00'
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> num=1 because it will take the value of remainingseconda which is 1;
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> return value ='01' it will take number 1 then will convert to sting then it will add 0 to the first because it is only one character .
diff --git a/Sprint-2/5-stretch-extend/format-time.js b/Sprint-2/5-stretch-extend/format-time.js
index 32a32e66b..dc788fa32 100644
--- a/Sprint-2/5-stretch-extend/format-time.js
+++ b/Sprint-2/5-stretch-extend/format-time.js
@@ -1,25 +1,95 @@
 // This is the latest solution to the problem from the prep.
 // Make sure to do the prep before you do the coursework
-// Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
+//
+// function formatAs12HourClock(time) {
+//   const hours = Number(time.slice(0, 2));
+//   if (hours > 12) {
+//     return `${hours - 12}:00 pm`;
+//   }
+//   return `${time} am`;
+// }
 
-function formatAs12HourClock(time) {
+// const currentOutput = formatAs12HourClock("08:00");
+// const targetOutput = "08:00 am";
+// console.assert(
+//   currentOutput === targetOutput,
+//   `current output: ${currentOutput}, target output: ${targetOutput}`
+// );
+
+// const currentOutput2 = formatAs12HourClock("23:00");
+// const targetOutput2 = "11:00 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// const currentOutput3=formatAs12HourClock("00:00");
+// const targetOutput3="12:00 am";
+// console.assert(currentOutput3===targetOutput3,
+//   `current output: ${currentOutput3}, target output: ${targetOutput3}`
+// )
+// const currentOutput4=formatAs12HourClock("12:00");
+// const targetOutput4="12:00 pm";
+// console.assert(currentOutput4===targetOutput4,
+//   `current output: ${currentOutput4}, target output: ${targetOutput4}`
+// )
+
+// This is my version
+function TimeAs12hours(time) {
   const hours = Number(time.slice(0, 2));
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+  const minutes = time.slice(3);
+  if (hours === 0) {
+    return `12:${minutes} am`;
+  } else if (hours > 12) {
+    return `${hours - 12}:${minutes} pm`;
+  } else if (hours === 12) {
+    return `${time} pm`;
   }
   return `${time} am`;
 }
 
-const currentOutput = formatAs12HourClock("08:00");
-const targetOutput = "08:00 am";
+let currentTime = TimeAs12hours("12:02");
+let targetTime = "12:02 pm";
+console.assert(
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
+);
+currentTime = TimeAs12hours("10:30");
+targetTime = "10:30 am";
+console.assert(
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
+);
+
+currentTime = TimeAs12hours("04:30");
+targetTime = "04:30 am";
+console.assert(
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
+);
+
+currentTime = TimeAs12hours("13:30");
+targetTime = "1:30 pm";
+console.assert(
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
+);
+currentTime = TimeAs12hours("23:09");
+targetTime = "11:09 pm";
+console.assert(
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
+);
+
+currentTime = TimeAs12hours("00:00");
+targetTime = "12:00 am";
 console.assert(
-  currentOutput === targetOutput,
-  `current output: ${currentOutput}, target output: ${targetOutput}`
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
 );
 
-const currentOutput2 = formatAs12HourClock("23:00");
-const targetOutput2 = "11:00 pm";
+currentTime = TimeAs12hours("12:00");
+targetTime = "12:00 pm";
 console.assert(
-  currentOutput2 === targetOutput2,
-  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+  currentTime === targetTime,
+  `current time:${currentTime}, Target Time:${targetTime}`
 );